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- W. BAHRE.

DOOR CHECK.

No. 320,527. Patented June 23, 1885.1

UNITED STATES PATENT OFFICE.

'WILHELM BAHRE, OF BERLIN, GER-MANY.

DOOR-CHECK.

idlEGTiPIGATIOEI forming part of Letters Patent No. 320,527, dated June 23, 1885, Applicaton filed September is, L 84 (No model.)

To all whom, it may (BO/b06772 Be it known that I, WILI-IELM BAHRE, a subject of the King of Prussia, residing at Berlin, Prussia, German Empire, have invented certain new and useful Improvements in Apparatus to Close Noiselessly Doors, of which the following is a specification, reference bein ghad therein to the accompanying drawings.

This invention relatesto mechanism for preventing the slamming of doors; and it con-.

sists, principally, in the combination of a sliding rod, which has a head and is carried bya door with a guide attached to the door-jamb, which throws said rod upward when the door is closed violently, and a spring arranged to receive the impact of said head when the rod is thus thrown up for the purpose of checking the door and preventing noise, all as hereinafter particularly set forth and claimed.

In the accompanying drawings, Figure 1 represents in front elevation a part of a door and door-frame provided with my improved devices for preventing slamming. Fig. 2 rep resents a side view of the same, the top of the door-frame and the spring attached thereto be.- ing shown in section. Fig. 8 represents a view similarto Fig. 2, except that the rod and its head are shown raised into position for the latter to strike against said spring. Fig. 4 represents a view, similar to Fig. 1, ofa modification of my door-slammingpreventing devices. Fig. 5 represents a similar view of another modification thereof. Fig. 6 represents an edge view, and Fig. 7 a plan view, of substitute devices for the head and the elevating guide and lever shown in Fig. 1. Fig. 8 represents an enlarged detail plan view of the spring before mentioned. (Here shown as provided with rubber cushions.) Fig.- 9 represents a front view, Fig. 10 a plan view, and Fig. 11 aside view, of another modification of my invention.

In said drawings, Adesignates the door; 13, the doorjamb; O, the top bar of the door-frame; a, a plate secured to said door and provided with two outwardly-extending tubular bosses, I), which serve as guides and as means of attachment for a rod, 0, which moves vertically up and down through them. The upper end of this rod is provided with a head, (2. A cord, e, connects the lower end of said rod 0 with the outer end of a c 'ank-arm, 9, formed upon a horizontal crankshaft, f, which turns in bearings f f attached to door A. This crank-arm in its normal position is horizontal, extending directly out from the door. as shown in Fig. 2, and at the other end of said crankshaft another cranlcarm, g, is formed, which is first bent downward, then horizontally in a line parallel to the door, and extending beyond the same, so as to overlap an arm, h, which extends outward from the door-jamb. This arm h is bent in the middle into the form of a broad inverted V. To the top bar, 0. of the door-frame is attached a spring, Z, which is arranged to be struck by the head (I of rod 0 whenever said head is raised suflieiently high.

\Vhen the arm 9 is brought gently into contact with arm h by the gradual closing of the door, it will ride up the outer incline of the latter arm and then slip down the inner incline thereof, the crank-shaft f being turned but a short distance and the head (I not being raised far enough to come opposite spring Z,- but when the door is violently closed the arm 9 will strike so forcibly against the outer incline of arm h that the crank-shaft f will be turned far enough to throw the arm 9 and rod 0 into the position shown in Fig. 3, bringing the head (Z opposite spring Z. Said head then strikes against said spring and is thrown backward a little by the resiliency of the latter, thus preventing the noise and jar of slamming the door. This spring Z is preferably bow-shaped, having one end fast and the other free, pads or cushions it; being provided at the point of contact, as shown in Fig. 8.

Instead of the crank-shaft f, I may, as shown in Fig. 4, use a lateral extension, at, of the lower end of rod 0, the arm it being located at a lower point on the door-jamb than in Figs. 1, 2, and 3, in order to be struck by said extension. A guide, 71, attached to the door, keeps said extension at in proper position for operation as it rises and falls. The cord e is of course dispensed with.

Another modification (shown in Fig. 5)e1nploys a lever, 0, arranged under the rod 0, but not attached thereto, the guide a being employed, as in Fi 4, and the operation being the same as in the latter modification, except that contact is substituted for the motion of a single piece.

Another modification (illustrated in Figs. 6 and 7) consists ofaframe, 9, which is hinged to the top bar, 0, of the door-frame below spring Z, and provided with two downwardlyinclined parallel rods or bars, q g, which leave a narrow channel or passage between them. This passage is wide enough to admit rod 0, but not wide enough to admit thehead (7. I11 this modification the hemispheres making up said head are divided and arranged on. said rod with their conveXities toward each other. The rod 0 at their point of contact enters the passage between rods or bars q, and the upper hemisphere normally rides up the incline of said rods or bars, lifting them and frame no more than is indicated by dotted lines in Fig. 6. Vhen the door is violently shut,however, the force of impact between the hemt spheres and the rods or bars q q is such that the head d and frame 1) are both thrown upward until the head (2 passes beyond the rods or bars (1 q into the wider opening 19 in the body of the frame. Said frame is then free'to fall, and the head (Z and rod 0 rising a little farther by their momentum, said head 'is brought into position to strike against spring Z, with results as aforesaid.

In the modification shown in Figs. 9,10, and 11, the rod '0 does not slide, but turns axially, and is provided at its upper end with horizontal arm 0' having pad t, and at its lower end with another horizontal rod, 8, these rods exspring, a, bearing against arm 8, tends to hold them in this position or return them thereto if they have been forced out of it. A bar, o, is hinged to a bracket, 1;, fastened on the doorjamb, said bracket preventing said hinged bar from turning toward the jamb beyond the vertical position, but allowing said bar to turn freely in the opposite direction. hen the door closes, arm 8 strikes against bar 1), and shaft or rod 0 is thereby turned, so as to bring the pad t, which is on the free end of arm 7', against the spring Z, as shown in Fig. 10. The door rebounds a little by reason of the resilience of said spring. The spring a brings the rod or shaft 0 and its arms 0* 8 back into the position shown in Fig. 9, and the door closes easily. Then the door is opened, the pressure of arm 8 against hinged bar '0 causes the latter to turn outward sufficiently to allow the passage of said arm, as shown in Fig. 11.

Having thus fully described my invention, what- I claim as new, and desire to secure by Letters Patent, is-- A rod, 0, provided with a head (1, and attached to a door, in combination with a spring attached to the door-frame and arranged to be struck by said head and an arm attached to said door-frame, and operating to throw said rod into position for said head to be engaged by said spring, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

XVILHELM BAHRE.

lVitnesses:

HUGO PATAKY, B. ROI. 

